Spring stylus mounting for phonographs



Get. 2 1923. 1,469,452

J. A. BROWN SPRING STYLUS MOUNTING FOR PHONOGRAPHS Filed July '7, 1922avwewtoz JJBrawm [UNIT D 3 Patented Oct. 2, 1923.

JULIUS A. nnown, or PEEKSKILL, new Yam, ,assreuonl.crofnnims'rilooiiirs, oi, if

PEEKSKILL,

NEW YORK.

SPRING STYLUS MOUNTING FOB PHONOGRAFHS.

Application filed July 7,

To all whom it may concern:

Be it known that I, JULIUS A. BROWN, a native of Austria, and who hasapplied for citizenship of the United States of America, and a residentof Peekskill, in the county of W'estchester and State. of New York, haveinvented certain new and usefullmprovements in Spring Stylus Mountingsfor Phonographs, of which the-following is a specification.

The object of the present inventionis to provide an improved form ofstylus arm mounting for a reproducer, that is constituted by a platespring doubled sharply on itself at one portion; and a further object isto pro vide such a spring member in which the axis or bend of thestructure will 'lie approximately in the plane of the diaphragm.

In the accompanying drawing showing one embodiment of my invention, Fig1 is a front elevation.

Fig. 2 is a side elevation partly in section.

Fig. 3 is an end elevation.

Figs. 4 and 5 show the spring member detached.

Fig. 6 shows the stylus arm and attached bracket.

Fig. 7 is a partial View enlarged through the spring and stylus arm.

Figs. Sand 9 show slight'modifications of the spring plate.

The reproducer may be of the usual or conventional form, the frame 2having the usual diaphragm 3 that is located a short distance within theouter plane of the frame. The stylus arm 4 is attached by one end to thediaphragm, and secured at its other end to a bracket 5, having anextension 6 arranged to carry the usual stylus needle 7.

A spring member denoted generally by 8 has two. portionsattachedrespectively to the bracket 5 and the frame 2. As shown this springcomprises a bottom strip portion 9, and a top strip portion 10'connected by a U-shaped portion 11, integral with both plates, thatisgiven a rounded bend so that these plates are slightly spaced apart,see Fig. 7. The upper plate 10 is suitably secured to the bracket 5 asby soldering. and

this plate may have an angular bend 12,

1922. Serial 1%. 573,425;

14, to secure this bottom plate to the frame 2. The upper plate 10extends longitudinally or in the direction of the frame, andfhas itsextremities bent downwardly at 15 and- 16 to engage the flatfaces of theframe at this portion.

These extremities are provlded w1th openings such as slots 17, 18 and.

screws 19 and'20 passed through these slots 11113013116 frame, for thepurpose of merely pressing the extremities against the frame at thisportion. Theplate 10 is also provided with large apertures 21, 22, abovethe apertures for the screws 14, to permitv application and removal'ofthese screws, that hold the lower plate on the frame.

It will thus be seen that the bracket carrying the stylus arm andneedleare rigidly secured-to the spring plate beyond the bent extensions,while the ends of the extensions This will produce a resllient portionthat can vibrate adare securedto the frame.

jacent the bend 11,.wliich is substantially in the plane of thediaphragm 3. By this means the. strain at the connection of the stylusarm with the diaphragm is substantially-perpendicular to the diaphragmand will not tend to loosen the connection with the diaphragm; that issomewhat angular in other constructions and tends to extendthi'sconnection and injure the diaphragm.

In'Fig. 8 I show a slight modification in which the bend correspondingto the bend tionssubstantially parallel, one bar ofthe' strip beingsecured'to thereproducer frame, the other bar portion being secured tothe stylus arm bracket at it'smiddle part, said latter bar havingslotsat the end portions,

and screws passed through each said slotted portion into the frame.

2. A stylus arm mounting, comprising a flat'strip of resilientsheet-metal substantially H-shaped, the middle connecting portion beingbent to bring the tWo bar portions substantially parallel, one bar ofthe strip being secured tothe reproducer frame, the other bar portionbeing secured to the stylus arm bracket at its middle part, said latterher having slots at the end portions, and

screws passed through eachsaid slotted portion into the frame, said barportion also having a short extension on this free longitudinal edgethat is reduced at the middle portion. a

Signed at New York, New York, on June 23d,1922. V V

JULIUS A.;BR0WN.

